Chapteronesectionone
- 1. Warm Up 120(0.05)(3.5) 2. 5. Find the perimeter of the square. 3. 4. 7.1 cm
- 2. Chapter One Connections to Algebra
- 3. Section 1.1 Variables in Algebra Definitions: Variable – is a letter that is used to represent one or more numbers
- 4. Value – this is the number of the variable
- 5. Variable Expression – a collection of numbers, variables, and operations
- 6. Evaluating the expression – replacing each variable in an expression by a number is this
- 7. Examples Variable Expression Meaning Operation 8y 8·y 8(y) 8 times y Multiplication 16 ÷ b 4 + s 9 – s
- 8. Practice Evaluating Expressions Evaluate the expression when y = 2 a. 8y b. c. y + 3 d. 14 - y
- 9. Evaluating Real Life Expression Average Speed = =
- 10. Find the average speed of a car that traveled 180 miles from Boise, Idaho, to Minidoka National Wildlife Refuge in 3 hours.
- 11. Evaluating a Geometric Expression The perimeter of a triangle is equal to the sum of the lengths of its sides: a + b + c.
- 12. Find the perimeter of the triangle. c = 17 a = 8 b = 15
- 13. Evaluating Simple Interest The simple interest earned by money P(called the principal) at an annual interest rate r for t years is given by Prt. You deposit $650 at a rate of 8% per year. How much simple interest will you earn after one half of a year?